In Eastern traditions, especially that of the Eastern Orthodox Churches, the Divine Liturgy is seen as transcending time, and the world. All believers are believed to be united in worship in the Kingdom of God along with departed Saints and the celestial Angels. To this end, everything in the Liturgy is seen as symbolic, yet also not just merely symbolic, but making the unseen reality manifest. According to Eastern tradition and belief, the Liturgy's roots go back to Jewish worship and the adaptation of Jewish worship by Early Christians. This can be seen in the first parts of the Liturgy that is termed, the "Liturgy of the Word" that includes reading of scriptures and the Sermon/Homily. The latter half was believed to be added based on the Last Supper and the first Eucharistic celebrations by Early Christians. Eastern Christians participating in the Liturgy also traditionally believe that the Eucharist is the central part of the service, as they believe it truly becomes the real Body and Blood of Christ, and through their partaking of it, they see themselves as together becoming the Body of Christ (that is, the Church). Each Liturgy has its differences from others, but most are very similar to each other with adaptations based on tradition, purpose, culture and theology.[3][4]

Additionally, the Liturgy of the Presanctified Gifts (6th century A.D.), is used on Wednesdays and Fridays during Great Lent and on the first three days of Holy Week. It is essentially the office of vespers with a communion service added, the Holy Gifts having been consecrated and reserved the previous Sunday. It is traditionally attributed to St. Gregory the Dialogist. The Divine Liturgy of St. Mark was also observed in the Orthodox (Chalcedonian) Patriarchate of Alexandria on at least that Saint's day until fairly recent times, while the Byzantine Royal Hours, which were once reserved to the Great Church (Agia Sophia), are much more akin to the Alexandrian divine office than they are to the standard Horologion.

Structure

Note: Psalms are numbered according to the Greek Septuagint. For the Hebrew Masoretic numbering that is more familiar in the West, usually add '1'. (See the main Psalms article for an exact correspondence table.)

The format of Divine Liturgy is fixed, although the specific readings and hymns vary with season and feast.

While arrangements may vary from liturgy to liturgy, the Divine Liturgy always consists of three interrelated parts:

the Liturgy of the Catechumens, so called because in ancient times catechumens were allowed to attend, also called the Liturgy of the Word;

and the Liturgy of the Faithful, so called because in ancient times only faithful members in good standing were allowed to participate. In modern times, this restriction applies only to Holy Communion — reception of the sacrament of holy communion.

Liturgy of the Catechumens

Litany of the Catechumens. The antimens is opened three-quarters of the way; the final portion will be unfolded at the petition: "That He (God) will reveal unto them (the catechumens) the Word of Truth."

with the Refrain (in the Greek rubrics) on Sundays: "Save us O Son of God who art Risen from the dead, Save us who sing unto you, Alleluia" and on Weekdays: "Save us O son of God who art Wondrous in your Saints..."°

Third Antiphon° (usually the Beatitudes with troparia from the canon of Matins, Odes 3 and 6; in the Greek rubrics, Psalm 94)

with the Refrain (in the Greek rubrics) on Weekdays: O Son of God who art wonderful in Thy saints, Save us who sing to thee, alleluia. On Sundays: the Troparion of the Day, Saint or Sunday Resurrection

In the early Church, only Baptised members in good standing were allowed to attend this portion of the Liturgy. Today, catechumens are still dismissed but visitors are usually permitted to stay. Some jurisdictions also permit the catechumens to remain.

First Litany of the Faithful

Second Litany of the Faithful

Cherubic Hymn°—chanted by the Choir as spiritual representatives (or icons) of the angels

Parts marked ° indicate portions that can change according to the day or liturgical season of the year. Some parts change at every Divine Liturgy, some parts only change at Pascha (Easter).

Note that almost all texts are chanted throughout the Divine Liturgy, not only hymns but litanies, prayers, creed confession and even readings from the Bible. The sole exception is the sermon.

Oriental Orthodox

The Oriental Orthodox have 4 principal Divine Liturgies:

The Liturgy of St. Basil (4th Century A.D.)

The Liturgy of St. Cyril (5th Century A.D.)

The Liturgy of St. James (1st Century A.D.)

The Liturgy of St. Gregory

The Liturgy of St. Basil is celebrated on most Sundays and contains the shortest anaphora. The Liturgy of St. Gregory is usually used during the feasts of the Church but not exclusively. In addition the clergy performing the Liturgy can combine extracts of The Liturgies of St. Cyril and St. Gregory to the more frequently used St. Basil at the discretion of the Priest or Bishop.